US3965628A - Drill mast support assembly - Google Patents
Drill mast support assembly Download PDFInfo
- Publication number
- US3965628A US3965628A US05/562,175 US56217575A US3965628A US 3965628 A US3965628 A US 3965628A US 56217575 A US56217575 A US 56217575A US 3965628 A US3965628 A US 3965628A
- Authority
- US
- United States
- Prior art keywords
- mast
- assembly
- specified
- drill
- drilling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005553 drilling Methods 0.000 claims abstract description 49
- 230000000087 stabilizing effect Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 18
- 238000010168 coupling process Methods 0.000 description 18
- 238000005859 coupling reaction Methods 0.000 description 18
- 230000005540 biological transmission Effects 0.000 description 10
- 230000000712 assembly Effects 0.000 description 8
- 238000000429 assembly Methods 0.000 description 8
- 239000012530 fluid Substances 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/084—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with flexible drawing means, e.g. cables
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
Definitions
- drilling rigs blast hole drills for example, for the purpose of drilling deep holes into the earth.
- drilling rigs have commonly included an elongated drilling mast pivotally carried by a mobile support base and movable with respect thereto intermediate a collapsed or inoperative position and an operative position.
- difficulty has commonly been encountered in the preparation of such rigs for drilling operation.
- such rigs have been provided with rotary power coupling means for transmitting rotary drilling power to the drilling apparatus carried by the mast.
- such couplings have typically been disengaged when the mast was in the inoperative position and have required considerable manual effort to recouple when moving the mast to the operative position.
- difficulties have been encountered in securing the latch or locking devices used to lock the drilling mast in the operative position, again due to the extensive manual effort typically required.
- the present invention alleviates these and other shortcomings of prior art drilling rigs by providing a rotary power transmitting coupling which automatically and quickly engages or disengages upon movement of the drilling mast to or from the operative position, respectively, and powered latch or lock means for securing the drill mast in the operative position thereof.
- the improved latch means further provides for more efficient handling and securing of the struts commonly utilized to brace upper portions of the drill mast in the operative position.
- FIG. 1 illustrates in side elevation a drilling apparatus embodying the present invention
- FIG. 2 is an end elevation of the drilling apparatus of FIG. 1 taken from line 2--2 of FIG. 1 with the drill mast shown partially broken away;
- FIG. 3 is an enlarged fragmentary portion of FIG. 1 illustrating the coupling means and the lower latch means of this invention
- FIG. 4 is an enlarged longitudinal section of the coupling of FIG. 3;
- FIG. 5 is a transverse section taken on line 5--5 of FIG. 4;
- FIG. 6 is an enlarged longitudinal section of the latch means of FIG. 3;
- FIG. 7 is a fragmentary portion of FIG. 1 illustrating, partially in section, the upper latch assembly of this invention.
- FIG. 8 is a sectional view of the upper latch taken on line 8--8 of FIG. 7.
- FIGS. 1 and 2 There is generally indicated at 10 in FIGS. 1 and 2 a mobile drilling apparatus constructed in accord with the principles of the present invention.
- the apparatus 10 may take the form of any of various well known drilling rigs adapted to bore holes generally downwardly into the earth but for purposes of illustration is herein shown as a blast hole drill.
- the apparatus 10 comprises an elongated boom or mast assembly shown at 12 in the upright or operative position thereof and including well known drilling means 14 movably carried thereon for drilling holes downwardly into the earth in a manner well known in the art.
- Boom 12 is shown as being carried adjacent a rearward end portion of any suitable mobile base such as a truck 16 having wheels 18 which render the apparatus 10 readily movable over terrain 19 and preferably over rough terrain such as commonly encountered in open pit mines, quarries, construction sites and other locations where the use of such drills may often be required.
- a truck 16 having wheels 18 which render the apparatus 10 readily movable over terrain 19 and preferably over rough terrain such as commonly encountered in open pit mines, quarries, construction sites and other locations where the use of such drills may often be required.
- boom 12 is pivotally carried by truck a frame or 16 as for example by means of a transversely disposed pivot pin 20 connecting a lower portion of the boom 12 to a rearward portion of truck 16 to render boom 12 pivotal in a vertical plane intermediate the operative drilling position thereof and a generally horizontal or collapsed non-drilling position thereof atop the truck 16 as indicated by phantom lines at 12' in FIG. 1.
- boom 12 is not well suited for traversing of the terrain by apparatus 10 and that pivoting the boom 12 to the collapsed position 12' greatly facilitates such traversing, for example by decreasing apparatus top weight and increasing stability, and by minimizing clearance problems with respect to obstacles in the path to be traversed.
- any suitably adapted power means such as a fluid operable extensible piston and cylinder assembly 21 pivotally connected adjacent opposed longitudinal ends thereof to the truck 16 and the boom 12, respectively, by respective pivot pins 28 and 30 disposed on axes parallel to the axis of pivot 20.
- Assembly 21 includes any suitable fluid control means (not shown) cooperable therewith for selective powered extension and retraction thereof to selectively pivot the boom 12 intermediate the respective operative and collapsed positions.
- a plurality of powered latch or lock means comprised of lower latch or lock assemblies 22 carried by a lower rearward portion of the truck 16 (FIG. 3) and operable to engage a lower portion of the boom 12, and upper latch or lock assemblies 24 carried by laterally opposed upper side portions of the boom 12 and operable to engage outer end portions of respective, laterally spaced elongated diagonal struts or braces 26 which are pivotally secured as at 23 adjacent the opposite longitudinal ends thereof to the truck 16 for pivoting in substantially vertical planes.
- the latch assemblies 22 and 24 may be powered by any suitable means, for example by fluid operable extensible piston and cylinder assemblies such as described hereinbelow and may advantageously be provided with common control means for coincident operation of the respective latches and simplified control thereof.
- the apparatus 10 is further provided with rotary power means for driving the drilling apparatus 14, for example a power takeoff (not shown) from the engine of truck 16 which is drivingly connected as through a longitudinally extending torque transmitting shaft 34 to a first drill transmission 32 rigidly carried by a lower portion of boom 12.
- the shaft 34 includes forward and rearward axially aligned shaft portions 34a and 34b, respectively, which are drivingly engaged at the respective adjacent ends thereof by a torque transmitting coupling 36.
- the shaft portion 34a is operative as the power output shaft of the hereinabove mentioned rotary power means (not shown), and the shaft portion 34b is operative as the power input shaft of transmission 32.
- coupling 36 is operative to transmit torque loads between the shaft portions 34a and 34b only when boom 12 is in the operative position thereof.
- preparation for drilling operations involves positioning the truck 16 adjacent the selected drilling location and stabilizing and leveling the truck as by means of well known front and rear leveling jacks 38 to provide a solid base from which to perform the required drilling. Further preparatory to drilling, the boom 12 is pivoted from the collapsed position 12' thereof in which it had been disposed for movement of the truck 16 over the terrain to the operative position thereof whereat the axially aligned shaft portions 34a and 34b are joined in torque transmitting engagement by coupling 36 for the transmitting of power to the drilling means 14, and latches 22 and 24 are actuated to secure boom 12 in the operative position.
- Drilling operations comprise the employment of rotary power supplied through shaft 34 to drive the drilling means 14 which comprises, in addition to the transmission 32, a second drill transmission 40 carried by boom 12 and selectively movable longitudinally therealong as by means of a well known chain and sprocket assembly 42 having a chain 48 passing around sprockets 44 adjacent opposed ends of the boom 12 and adapted for orbital circulation with respect thereto.
- the transmission 40 is suitably affixed to the chain 48 whereby, by actuation of any suitable power means (not shown) adapted to power the chain 48 in such orbital circulation, transmission 40 may be selectively moved longitudinally of boom 12.
- Drilling means 14 further includes an elongated power shaft 52 of polygonal cross section extending longitudinally of boom 12 and journaled for axial rotation adjacent upper and lower ends thereof to an upper portion of boom 12 and to the power output of transmission 32 as at 33.
- Shaft 52 extends in a known manner in sliding engagement through an annular input drive portion of transmission 40 having a polygonal cross section which mates with the periphery of shaft 52 for rotary driving engagement therebetween whereby transmission 40 is adapted to receive rotary driving power coincidentally with movement thereof longitudinally of the boom 12 under the impetus provided by chain and sprocket assembly 42.
- a drill string 56 is suitably affixed to a rotary power output portion of transmission 40 whereby there is imparted to string 56 a selectively controllable downwardly directed rotary drilling action for drilling holes as desired in the earth.
- the male member 60 comprises a generally annular body 64 rigidly affixed coaxially to a rearward end portion of shaft 34a as by being non-rotatably keyed thereonto by a shear pin 66 disposed within keyways 68, and by being captively retained axially intermediate a nut 72 threadingly engaging the rearwardmost end of the shaft 34a and an annular shoulder portion 70 of shaft 34a spaced forwardly from nut 72.
- the body 64 includes an outer polygonal periphery 74 adapted to engage in rotary driving engagement a mating inner peripheral portion 76 of member 62.
- the member 62 comprises a generally annular body member 78 having the inner peripheral portion 76 formed therein adjacent the forwardmost end thereof.
- Body 78 is mounted upon a forward end portion of shaft 34b as follows.
- the body 78 includes therein an axial opening formed by an internally splined cylindrical sleeve member 80 suitably rigidly affixed as by weldments within a through bore 84 extending axially within member 78.
- the sleeve 80 receives axially therewithin a cooperably splined end portion 86 of the shaft 34b such that member 78 is non-rotatably carried by shaft 34b and longitudinally slidable with respect thereto intermediate a forward stop 79 and a rearward stop 81.
- the plate 100 carries a plurality of angularly spaced, forwardly extending spring retainer pins 104 as by having the pins 104 suitably rigidly affixed within respective axially extending through bores 106 within the plate 100.
- Each of pins 104 is aligned with one of a respective plurality of rearwardly opening recesses 108 formed within the body member 78 such that a respective plurality of helical compression springs 110 may be retained coaxially within recesses 108 and about pins 104 and extending intermediate plate 100 and member 78 so as to provide a biasing force therebetween urging the member 78 forwardly against stop 79.
- the member 78 further includes a rearwardly extending coaxial cylindrical skirt portion 112 which slidably, sealingly receives therewithin an outer peripheral portion 114 of plate 100 as by means of any suitable annular seal 116 disposed radially therebetween to sealingly encase the springs 110 thereby precluding entry of airborne dust and dirt generated during drilling.
- coupling 36 is disposed such that the male and female members 60 and 62, respectively, are readily engageable in driving relation upon pivoting of the mast 12 to the operative position thereof.
- coupling 36 is positioned on a line X--X paralleling the axis of boom 12 and passing through the boom pivot 20 such that as boom 12 is pivoted to the operative position thereof the coupling member 62 moves in an arcuate path which, at the point of engagement of members 60-62, is substantially tangent to the axis of shaft portion 34a and member 60 whereby the coupling operation is considerably simplified.
- the coupling members 60 and 62 are in driving engagement only when the boom is in the operative position as shown in solid lines at 12.
- the coupling member 62 moves substantially rearwardly and substantially tangentally with respect to the axis of member 60 to break driving engagement between the respective mating peripheral portions 76 and 74 thereof, and thence moves arcuately rearwardly and upwardly to the position 62' as the boom 12 is pivoted into the collapsed position 12'.
- the member 62 Upon returning the boom 12 to the operative position the member 62 moves arcuately downwardly and forwardly to once again engage the member 60 in driving relation as hereinabove described.
- the mechanical shock of the initial contact between the members 60 and 62 upon reengagement thereof is absorbed by sliding movement of the member 78 rearwardly upon splined shaft portion 86 to compress springs 110 whereby the excessive wear and damage commonly resulting in the prior art from repeated engagement of such couplings is minimized.
- the capacity for axial movement of the member 78 upon shaft portion 86 additionally assists in the engagement of members 60 and 62 by aiding in the alignment of the respective members after initial contact therebetween and before final driving engagement thereof is achieved.
- the member 78 may be displaced axially rearwardly from forward stop 79 as shown in FIG. 4 by forceful contact with member 60 whereby the resulting forward bias of springs 110 provides improved driving engagement between the members 60 and 62 and compensates for any axial play therebetween.
- lower latch assemblies 22 As hereinabove indicated, the operative position of the boom 12 is maintained by lower and upper powered latch assemblies 22 and 24, respectively.
- One of lower latch assemblies 22 is shown in FIGS. 3 and 6 as comprising a housing 119 rigidly affixed to the truck 16 and carrying therewithin a fluid operable extensible piston and cylinder assembly 118 having a latch element 120 carried adajcent the outermost end of a piston rod portion 122.
- the latch element 120 is pivotally affixed to the rod 122 as by being pivoted by a pin 124 intermediate the legs of a clevis member 126 rigidly affixed to the outermost end of the rod 122.
- assembly 118 is similarly pivotally affixed adjacent an upper end portion of the housing 119 as by having a lug portion 128 thereof being pivoted by means of a pin 129 to a cooperable lug 130 rigidly affixed to the housing 119 such that the entire assembly 118 depends from the pin 129 within housing 119.
- the boom 12 includes a latch plate portion 136 rigidly affixed adjacent a lower rearward portion thereof and cooperable with the latch 22 whereby, as the boom 12 is pivoted to the operative position thereof, the plate 136 is moved arcuately downwardly and forwardly to a position subjacent the plate 132 whereat an aperture 138 in the plate 136 registers with aperture 134 to receive the latch element 120.
- latch element 120 Upon subsequent actuation of the assembly 118 to extend rod 122, latch element 120 extends within the apertures 134 and 138 to secure the latch plate 136 with respect to latch assembly 22 thereby securing the boom 12 in operative position thereof.
- each latch assembly 24 includes a housing 140 pivotally carried adjacent one lateral side of an upper portion of boom 12 as by means of a transverse pivot pin 142 rigidly affixed to the housing 140 and extending transversely therefrom through a transverse bore 143 in a support portion 144 of the boom 12.
- the housing 140 carries therewithin a suitable fluid operable extensible piston and cylinder assembly 146, for example having a form and construction identical to that of the assembly 118 described hereinabove for the latches 22.
- the housing 140 includes a cylindrical sleeve guide portion or support 150 rigidly affixed subjacent a lower transversely extending latch guide plate 148 thereof, which sleeve 150 is adapted to slidably receive therewithin one of struts 26 (FIG. 1).
- the axis of pin 142 intersects the axis of the sleeve 150 as shown whereby the tendency for sleeve 150 to bind upon strut 26 during sliding movement therealong is minimized.
- Each strut 26 includes an end cap 152 which precludes separation of the strut 26 from the respective sleeve 150, and an aperture 154 spaced from the end cap 152 and adapted to receive a latch element 156 of the assembly 146.
- Each of the assemblies 146 is concomitantly operable with assemblies 118 of latches 22 to drive the elements 156 through a guide aperture 158 extending within guide plate 148 and sleeve 150 to engage the aperture 154 of the respective strut 26 whereby the mast 12 is rigidly secured and braced in the operative position thereof by the cooperating latches 22 and 24.
- struts 26 are also lowered from their diagonal operative position whereat they brace the upper portion of boom 12, to a collapsed position 26' (FIG. 1) substantially parallel to the collapsed position 12' of boom 12. More particularly, as boom 12 is pivoted to the collapsed position 12' the upper portions thereof move arcuately downwardly and forwardly whereby the guide sleeves 150 of latches 22 slide forwardly along the respective struts 26 to the position indicated at 24' thereby pivoting struts 26 about their respective pivots 23 downwardly to the collapsed position 26'.
- a drilling apparatus including a pivotal drill mast with improved rotary power coupling means and improved lock or latch means for securing the mast in the operative position for drilling.
- latches 22 and 24 may be operable by means other than fluid pressure actuating means, a solenoid for example; the particular manner of sliding engagement latching between latches 24 and braces 26 may be varied within a broad design latitude; and the like.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
Description
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/562,175 US3965628A (en) | 1974-04-05 | 1975-03-26 | Drill mast support assembly |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US45833174A | 1974-04-05 | 1974-04-05 | |
US05/562,175 US3965628A (en) | 1974-04-05 | 1975-03-26 | Drill mast support assembly |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US45833174A Continuation-In-Part | 1974-04-05 | 1974-04-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3965628A true US3965628A (en) | 1976-06-29 |
Family
ID=27038960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US05/562,175 Expired - Lifetime US3965628A (en) | 1974-04-05 | 1975-03-26 | Drill mast support assembly |
Country Status (1)
Country | Link |
---|---|
US (1) | US3965628A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4088289A (en) * | 1977-02-25 | 1978-05-09 | Gardner-Denver Company | Mast support arrangement for portable drill rig |
FR2463258A1 (en) * | 1979-08-06 | 1981-02-20 | Manten Heinrich | PERFECTOR GUIDED BY AFFUT OR BY MAT |
US4344599A (en) * | 1977-12-21 | 1982-08-17 | Atlas Copco Aktiebolag | Rock drill boom structure |
US4908967A (en) * | 1988-12-16 | 1990-03-20 | Leece Quentin J | Heavy duty rock trencher |
US5273124A (en) * | 1991-01-07 | 1993-12-28 | Rock Star Technology, Inc. | Earth drilling apparatus |
US5385425A (en) * | 1992-01-10 | 1995-01-31 | Hayes; Randall A. | Apparatus and method for repair of roadway |
US20050051364A1 (en) * | 2003-09-08 | 2005-03-10 | Bowe James M. | Feed table pivot pin constraining device |
US20060243490A1 (en) * | 2005-04-28 | 2006-11-02 | Astec Industries, Inc. | Apparatus and method for modified horizontal directional drilling assembly |
EP1751390A2 (en) * | 2004-04-30 | 2007-02-14 | Astec Industries, Inc. | Apparatus and method for modified horizontal directional drilling assembly |
US20110174545A1 (en) * | 2010-01-15 | 2011-07-21 | Vermeer Manufacturing Company | Drilling machine and method |
US8033345B1 (en) | 2004-04-30 | 2011-10-11 | Astec Industries, Inc. | Apparatus and method for a drilling assembly |
US20140190714A1 (en) * | 2011-06-07 | 2014-07-10 | Suk Shin In | Lead supporting device of drilling machine |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2849212A (en) * | 1956-12-10 | 1958-08-26 | Robbins Davis | Drilling apparatus |
US2904310A (en) * | 1957-08-19 | 1959-09-15 | Raymond F Leonard | Portable hydraulic drilling rig |
US3012619A (en) * | 1959-01-06 | 1961-12-12 | Olive S Petty | Drilling rig |
US3252527A (en) * | 1963-09-04 | 1966-05-24 | George E Failing Company | Rotary drilling rig and angle drive therefor |
US3778940A (en) * | 1972-06-29 | 1973-12-18 | Ingersoll Rand Co | Transferential pin |
US3805463A (en) * | 1973-02-15 | 1974-04-23 | Bucyrus Erie Co | Drill mast back brace |
US3815690A (en) * | 1972-11-13 | 1974-06-11 | Longgear Co | Adjustable mast for drilling apparatus |
-
1975
- 1975-03-26 US US05/562,175 patent/US3965628A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2849212A (en) * | 1956-12-10 | 1958-08-26 | Robbins Davis | Drilling apparatus |
US2904310A (en) * | 1957-08-19 | 1959-09-15 | Raymond F Leonard | Portable hydraulic drilling rig |
US3012619A (en) * | 1959-01-06 | 1961-12-12 | Olive S Petty | Drilling rig |
US3252527A (en) * | 1963-09-04 | 1966-05-24 | George E Failing Company | Rotary drilling rig and angle drive therefor |
US3778940A (en) * | 1972-06-29 | 1973-12-18 | Ingersoll Rand Co | Transferential pin |
US3815690A (en) * | 1972-11-13 | 1974-06-11 | Longgear Co | Adjustable mast for drilling apparatus |
US3805463A (en) * | 1973-02-15 | 1974-04-23 | Bucyrus Erie Co | Drill mast back brace |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4088289A (en) * | 1977-02-25 | 1978-05-09 | Gardner-Denver Company | Mast support arrangement for portable drill rig |
US4344599A (en) * | 1977-12-21 | 1982-08-17 | Atlas Copco Aktiebolag | Rock drill boom structure |
FR2463258A1 (en) * | 1979-08-06 | 1981-02-20 | Manten Heinrich | PERFECTOR GUIDED BY AFFUT OR BY MAT |
US4908967A (en) * | 1988-12-16 | 1990-03-20 | Leece Quentin J | Heavy duty rock trencher |
US5273124A (en) * | 1991-01-07 | 1993-12-28 | Rock Star Technology, Inc. | Earth drilling apparatus |
US5385425A (en) * | 1992-01-10 | 1995-01-31 | Hayes; Randall A. | Apparatus and method for repair of roadway |
US20050051364A1 (en) * | 2003-09-08 | 2005-03-10 | Bowe James M. | Feed table pivot pin constraining device |
US7100709B2 (en) * | 2003-09-08 | 2006-09-05 | Metso Minerals Industries, Inc. | Feed table pivot pin constraining device |
EP1751390A4 (en) * | 2004-04-30 | 2010-03-03 | Astec Ind | Apparatus and method for modified horizontal directional drilling assembly |
EP1751390A2 (en) * | 2004-04-30 | 2007-02-14 | Astec Industries, Inc. | Apparatus and method for modified horizontal directional drilling assembly |
US8033345B1 (en) | 2004-04-30 | 2011-10-11 | Astec Industries, Inc. | Apparatus and method for a drilling assembly |
US20060243490A1 (en) * | 2005-04-28 | 2006-11-02 | Astec Industries, Inc. | Apparatus and method for modified horizontal directional drilling assembly |
US7318491B2 (en) * | 2005-04-28 | 2008-01-15 | Astec Industries, Inc. | Apparatus and method for modified horizontal directional drilling assembly |
US20110174545A1 (en) * | 2010-01-15 | 2011-07-21 | Vermeer Manufacturing Company | Drilling machine and method |
US20140190714A1 (en) * | 2011-06-07 | 2014-07-10 | Suk Shin In | Lead supporting device of drilling machine |
US9546522B2 (en) * | 2011-06-07 | 2017-01-17 | Suk Shin In | Lead supporting device of drilling machine |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: ROBBINS MANUFACTURING, INC., AN ALA CORP. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JOY MANUFACTURING COMPANY;REEL/FRAME:004189/0350 Effective date: 19830812 |
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Owner name: ROBBINS MANUFACTURING, INC. NORTH ONE RIVERCHASE P Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JOY MANUFACTURING COMPANY;REEL/FRAME:004194/0434 Effective date: 19831111 |
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Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES) |
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Owner name: MARATHON LETOURNEAU COMPANY, TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ROBBINS MANUFACTURING, INC., 300 FLEMING ROAD, BIRMINGHAM, AL A CORP OF AL;REEL/FRAME:005416/0523 Effective date: 19900625 |
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AS | Assignment |
Owner name: LETOURNEAU, INC., TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MARATHON LETOURNEAU COMPANY;REEL/FRAME:007247/0243 Effective date: 19941118 |